Stopping mechanism for looms



No. s2a,|74. Patented Apr. l8, I899.

.1. H. NORTHROP.

STOPPING MECHANISM FOR LOUIS.

(Application mm Dec. 9, 1898.)

(N0 Nodal.)

UNHED STATES PATENT OFFICE.

JAMES H. NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

STOPPING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 623,174, dated April 18, 1899.

A Application filed December 9, 1898. Serial No. 698,696. (No model.)

1'0 [066 whom it may concern; ver controlled by the weft, and the stop-i11- Be it known that I, JAMES H. NORTHROP, of dicator, the shipper having been released by llopedale,countyof \Vorcester,State of Masthe operation of the protector mechanism; sachusetts,have invented an Improvementin and Fig. 4 is a perspective view of the stop- 55 5 Stopping Mechanism for Looms, of which the indicator.

following description, in connection with the The loom-frame A, breast-beam A, proaccompanying drawings, is a specification, vided with the notched holding-plate N for like letters on the drawings representinglike the shipper-lever S, the knock-off lever b parts. operated upon failure of the weft, to release 60 It is now the custom to provide looms with the shipper-handle, the frog-holder F, actuseveral different stop-motion mechanisms all ating-dagger f Fig. 1, the frogf, and the coacting on'a common part, such as the shipoperating knock-off lever f, constituting the per-lever, to automatically stop the loom upon usual protector mechanism, operative when the occurrence of some one or more faults. the shuttle is not properly boxed to release 65 Thus warp and weft stop-motions are prothe shipper-lever, may be and are of usual or vided to stop the loom upon failure of either well-known construction. a warp-thread or the weft, and protector The stand 19 guide I) for the weft-fork mechanism is also provided to effect stoppage slide 19 the weft-fork b pivoted on the stand when the shuttle is improperly boxed, and at b the tailof the fork Z9 adapted at times 70 2o whatever the cause of the stoppage the shipto be engaged by a hook I), pivoted on the per-lever is released from its holding-notch weft-hammer A, Fig. 2, the latch clito ento ship the belt. As the stoppage of theloom gage and move the knock-off lever 17 upon a may thus result from any one of several second successive failure of the weft to tip causes, it will be obvious that there is noththe fork, the operatingshaft d for the filling- 75 ing to indicate to the attendant which cause supplying mechanism, (not shown,) and the has been operative to release the shipper-learm 0 connected with and to rock said shaft ver and stop the loom, and consequently the by the outward movement of the weft-fork various parts of the mechanism must be we slide 1)", are herein shown substantially as in amined in order to obtain such information United States Patent No. 529,943, dated No- 80 and remedy the fault. vember27, 1894, like parts herein having the When an attendant has charge of a numsame reference-letters. ber of looms, the rapidity with which one or The holding-notch n in the path N is heremore of them can be set in motion after stopin. shown as increased in width for a part of page is very largely dependent upon the faits length, as at n, Fig. 3, to receive a de- 85 cility with which the particular fault can be pending fin or lug h, forming a part of the discovered, and the greater the number of stop-indicator, shown as an arm 72, pivoted looms in operation the greater the output. at h on the breast-beam, and preferably This invention has for its object the proacted upon by a suitable friction pad or v duction of simple and effective means for inwasher 71, Fig. 2, held in place by a cap 71,3, 0. o dicating to the attendant the cause of the attached to the breast-beam. stoppage, whether due to a fault in the weft XV hen the shipper-handle is in the notch or warp or due to the operation of the pro- 02, the finger 7t of the stop-indicator rests in tector mechanism. the depression n of the notch against the Figure 1 is a left-side elevation of a suffishipper-lever, and the outer end of the knock- 95 cient portion of a loom to be understood with off lever b abuts against the outer face of my present invention embodied therein, the the finger, as in Figs. 1 and 2, so that the notched holding-plate for the shipper-lever latter is interposed between the shipper-lever being shown in section. Fig. 2 is an enlarged and the lever h. At the same time the protop or plan view thereof, the shipper-handle tector knock-off lever f rests against the I00 being shown in section. Fig. 3 is a similar finger, which projects below the plateN sufview of the holding-plate, the knock-off leficiently for the purpose, as clearly shown in Fig. 1, and when the loom is running properly the parts will be in the position shown in Figs. 1 and 2. It now the protector mechanism is operated, the leverf will be turned to push inwardly against the finger h, turning the stop-indicator into the position shown in Fig. 3, and thereby forcing the shipper-lever out of the holding-notch n to move into stopping position by the action of its spring S Fig. 1. moved, and the attendant by glancing at the stop-indicator sees that it alone has been moved, and he at once knows that the protector mechanism has operated and that the fault is in the shuttle. On the other hand, if the weft-fork mechanism had operated, due to failure of the weft, the latch 61 would have swung the knock-oft lever b and the latter would then act through the finger 71' to release the shipper-handle, and both the kn ockoff lever b and the stop-indicator h would be in abnormal position, showing the attendant that the faultwas with the filling.

As herein shown, the lower end of the shipper-lever extends below the pivot s, Fig. 1, on which it is loosely mounted in usual manner, and enters an inclined slot g in the upper end of a rocker-arm g, controlled as to its movement by suitable warp-stop-motion mech anism, a link g forming a part thereof, serving to at times move the rocker-arm Should a warp-thread break or become unduly slack, the warp-stop-motion mechanism will operate to swing the upper end of the rocker-arm g in the direction of arrow 10, Fig. 1, and the inclined edge of the slot will act on the shipper-lever below its fulcrum to move the upper end of said lever inward or out of its holding-notch, and the loom will be stopped. -Under such circumstances the stop-indicator remainsinnormalpositiomand consequentlythe attendant knows at once that neither the pro- The knock-off lever b has not been.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is P 1. In a loom, a shipper, a plurality of independent mechanisms constructed and arranged to individually operate, a knock-off lever for each mechanism, and a stop-indicator having a finger interposed between said levers and the shipper, said indicator being mountedadjacent one of the levers, the position of the stop-indicator relative to said adjacent lever denoting which of said mechanisms has operated to stop the loom.

2. In a loom, a shipper, its notched holding-plate, means operative upon failure of a warp-thread to act directly upon and release the shipper, a stop-indicator adjacent said shipper and remaining in normal position when such direct movement of the shipper is effected, protectormechanism, and weft-fork mechanism, individually operative to move the stop-indicator and through the mediation of the latter releasing the shipper, and a lever forming a part of one of said mechanisms, located adjacent the stop-indicator, the position of the latter relative to said lever indicating whether the protector or the weftfork mechanism has operated to release the shipper.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES H. NORTHROP.

\Vitnesses:

GEO. OTIS DRAPER, ALBERT H. OoUsINs. 

